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Melting temperature of YBa2Cu3O7 x and GdBa2Cu3O7 x at subatmospheric partial pressure

The melting temperature, Tm, of YBa2Cu3O7−x and GdBa2Cu3O7−x superconductor ceramic compounds has been measured by differential thermal analysis (DTA) over a large oxygen partial pressure range of five orders of magnitude (2·10−5 < PO2 < 1 bar). It is shown that the DTA peak and endset temperatures are closer to Tm than the onset temperature. Correct measurement of Tm requires low heating rates and subatmospheric pressure conditions to avoid temperature shifts due to local oxygen overpressure and kinetic effects

This work was funded by the Spanish Programa Nacional de Materiales through projects MAT2014-51778-C2-1-R and MAT2014-51778-C2-2-R. We also acknowledge: the Center of Excellence award Severo OchoaSEV-2015-0496, SGR753 and SGR948 from the Generalitat of Catalunya, the European Union through projects Eurotapes (EU-FP7 NMP-LA-2012-280432) and Ultrasupertape (ERC ADG-2014-669504), and the Universitat de Girona (MPCUdG2016/059)

Elsevier

Manager: Ministerio de Economía y Competitividad (Espanya)
Author: Taïr, Fadila
Carreras Blasco, Laura
Camps, Jaume
Farjas Silva, Jordi
Roura Grabulosa, Pere
Calleja, Albert
Puig Molina, Teresa
Obradors, Xavier
Abstract: The melting temperature, Tm, of YBa2Cu3O7−x and GdBa2Cu3O7−x superconductor ceramic compounds has been measured by differential thermal analysis (DTA) over a large oxygen partial pressure range of five orders of magnitude (2·10−5 < PO2 < 1 bar). It is shown that the DTA peak and endset temperatures are closer to Tm than the onset temperature. Correct measurement of Tm requires low heating rates and subatmospheric pressure conditions to avoid temperature shifts due to local oxygen overpressure and kinetic effects
This work was funded by the Spanish Programa Nacional de Materiales through projects MAT2014-51778-C2-1-R and MAT2014-51778-C2-2-R. We also acknowledge: the Center of Excellence award Severo OchoaSEV-2015-0496, SGR753 and SGR948 from the Generalitat of Catalunya, the European Union through projects Eurotapes (EU-FP7 NMP-LA-2012-280432) and Ultrasupertape (ERC ADG-2014-669504), and the Universitat de Girona (MPCUdG2016/059)
Document access: http://hdl.handle.net/2072/298491
Language: eng
Publisher: Elsevier
Rights: Attribution 3.0 Spain
Rights URI: http://creativecommons.org/licenses/by/3.0/es/
Subject: Superconductors d’alta temperatura
High temperature superconductors
Anàlisi tèrmica
Thermal analysis
Title: Melting temperature of YBa2Cu3O7 x and GdBa2Cu3O7 x at subatmospheric partial pressure
Type: info:eu-repo/semantics/article
Repository: Recercat

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